Curvature and Zeeman effects on persistent currents in a multi-walled carbon nanotorus

Taking into account both the intrinsic curvature and Zeeman effects, persistent currents in a multi-walled carbon nanotorus are explored by using a supercell method, within the tight-binding formalism. It is shown that in the absence of the Zeeman effect, the intrinsic curvature induces some dramati...

Full description

Saved in:
Bibliographic Details
Published inChinese physics B Vol. 19; no. 1; pp. 403 - 408
Main Author 徐宁 丁建文 马明明 汤贤
Format Journal Article
LanguageEnglish
Published IOP Publishing 2010
Subjects
Carbon
Curvature
Diamagnetism
Electric fields
Energy spectra
Formalism
Magnetic fields
Mathematical analysis
Nanocomposites
Nanomaterials
Nanostructure
Splitting
Zeeman effect
塞曼分裂
塞曼效应
多壁碳纳米管
形式主义
抗磁性
持续电流
电场能量
Online AccessGet full text

Cover

More Information
Summary:Taking into account both the intrinsic curvature and Zeeman effects, persistent currents in a multi-walled carbon nanotorus are explored by using a supercell method, within the tight-binding formalism. It is shown that in the absence of the Zeeman effect, the intrinsic curvature induces some dramatic changes in energy spectra and thus changes in the shape of the flux-dependent current. A paramagnetism diamagnetism transition is observed. With consideration of the Zeeman splitting energy, the period of persistent current is destroyed, and a diamagnetism-paramagnetism transition is obtained at high magnetic field. In addition, we further explore the effect of external electric field energy （Eef） on persistent current, indicating that it changes unmonotonously with Eef.
Bibliography:O488
multi-walled carbon nanotorus, tight-binding model, persistent current
11-5639/O4
TB383
ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ObjectType-Article-1
ObjectType-Feature-2
ISSN:1674-1056
2058-3834
DOI:10.1088/1674-1056/19/1/016101